GMS:Horizons to 3D Mesh: Difference between revisions
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##Boreholes – Boreholes can be created by importing borehole data by using the [[GMS:File Import Wizard|''File Import Wizard'']], importing sample data after boreholes already exist, or using the borehole tools to manually enter the boreholes. Once a borehole has been created it can be edited in the ''Borehole Editor'' or by using the borehole tools. Also an existing borehole can be copied. Boreholes can be locked to prevent them from being edited. | ##Boreholes – Boreholes can be created by importing borehole data by using the [[GMS:File Import Wizard|''File Import Wizard'']], importing sample data after boreholes already exist, or using the borehole tools to manually enter the boreholes. Once a borehole has been created it can be edited in the ''Borehole Editor'' or by using the borehole tools. Also an existing borehole can be copied. Boreholes can be locked to prevent them from being edited. | ||
##TINs – TINs can be created 3 different ways in GMS: manually entering the vertex locations and triangulating, converting a different GMS data type to a TIN, and copying a currently existing TIN. (See [[GMS:TIN Module#Creating a TIN|Creating TINs]]) | ##TINs – TINs can be created 3 different ways in GMS: manually entering the vertex locations and triangulating, converting a different GMS data type to a TIN, and copying a currently existing TIN. (See [[GMS:TIN Module#Creating a TIN|Creating TINs]]) | ||
##[[GMS:Raster Catalog|Raster Catalog]] – | ##[[GMS:Raster Catalog|Raster Catalog]] – A set of rasters defining the top of each horizon (available beginning in version 9.0). | ||
#'''Assign Horizon IDs''' – The term “horizon” refers to the top of each stratigraphic unit that will be represented in a corresponding | #'''Assign Horizon IDs''' – The term “horizon” refers to the top of each stratigraphic unit that will be represented in a corresponding solid, HUF unit or material layer. Horizons are numbered consecutively in the order that the strata are “deposited” (from the bottom up). Horizons can be assigned to both boreholes and TINs. (See [[GMS:Horizons|Horizons]]) | ||
#'''Create Primary 2D Mesh''' – A 2D mesh is needed to be used as a projection for the resulting 3D mesh. A 2D mesh or a meshing coverage needs to be created and selected as the primary mesh. The 2D mesh defines the boundary of the 3D | #'''Create Primary 2D Mesh''' – A 2D mesh is needed to be used as a projection for the resulting 3D mesh. A 2D mesh or a meshing coverage needs to be created and selected as the primary mesh. The 2D mesh defines the boundary of the 3D mesh. Also, the [[GMS:2D Mesh Polygon Attributes|meshing options]] assigned to primary coverage controls the elements of the 3D mesh that is created. (See [[GMS:2D Mesh Module#Creating a 2D Mesh|Creating 2D Meshes]]) | ||
#'''Setup additional optional inputs''' – Two additional options exist to help constrain and provide user intervention in the | #'''Setup additional optional inputs''' – Two additional options exist to help constrain and provide user intervention in the horizon modeling process. The two options are to create borehole cross sections or a horizon conceptual model. | ||
##[[GMS:Including Borehole Cross Sections|Including Borehole Cross Sections]] | ##[[GMS:Including Borehole Cross Sections|Including Borehole Cross Sections]] | ||
##[[GMS:Horizon Conceptual Model|Horizon Conceptual Model]] | ##[[GMS:Horizon Conceptual Model|Horizon Conceptual Model]] | ||
#'''Run the Horizons Wizard''' – Select the '''Horizons→3D Mesh''' command in the ''Borehole'' or ''TINs'' menu. (See [[GMS:Horizons Wizard|Horizons Wizard]]) | #'''Run the Horizons Wizard''' – Select the '''Horizons→3D Mesh''' command in the ''Borehole'' or ''TINs'' menu. (See [[GMS:Horizons Wizard|Horizons Wizard]]) | ||
== Horizon → 3D Mesh Algorithm == | == Horizon → 3D Mesh Algorithm == | ||
When the Horizon command is executed the horizons specified on the borehole contacts or TIN nodes are converted to a set of scatter points with one dataset for each horizon. The scatter points are then used to interpolate a surface for each horizon. Starting with the lowest numbered horizon, the surface is extruded down to create a set of elements in a 3D | When the '''Horizon → 3D Mesh''' command is executed the horizons specified on the borehole contacts or TIN nodes are converted to a set of scatter points with one dataset for each horizon. The scatter points are then used to interpolate a surface for each horizon. Starting with the lowest numbered horizon, the surface is extruded down to create a set of elements in a 3D mesh. The surface corresponding to the next horizon is then extruded down to fill in the space between that surface and the previous surface. This process is repeated for each surface. At each step, a set of elements are created for the current horizon and all previously defined elements are subtracted from that layer, resulting in an incremental buildup of the stratigraphy from the bottom to the top. The entire process results in a 3D mesh with each horizon layer represented by a material zone. | ||
<gallery widths="350 px" heights="250 px"> | |||
Image:Hor_TINs.png|TINs used to create a 3D mesh | |||
Image:Hor_3DMesh.png|3D mesh created via the horizons method | |||
</gallery> | |||
{{Navbox GMS}} | {{Navbox GMS}} | ||
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[[Category:FEMWATER]] | [[Category:FEMWATER]] | ||
[[Category:Horizons|3D]] | [[Category:Horizons|3D]] | ||
[[Category:Gallery]] | |||
